Two sinusoidal waves, identical except for phase, travel in the same direction along a string, producing a net wave y'(x, t) (4.00 mm) sin(14.0x-4.70t+ 0.500 rad), with x in meters and t in seconds. What are (a) the wavelength of the two waves, (b) the phase difference between them, and (c) their amplitude ym? (a) Number i Units (b) Number i Units (c) Number i Units